Abstract
The aim of this study was to explore whether vitamin D receptor (VDR) polymorphisms confer susceptibility to psoriasis. Meta-analyses were conducted on the associations between the VDR ApaI, TaqI, BsmI, and FokI polymorphisms and psoriasis. Nine relevant studies on VDR polymorphisms and psoriasis were included in this meta-analysis, which involved 742 psoriasis patients and 715 controls. Meta-analysis indicated an association between the VDR ApaI A allele and psoriasis in Turkish studies (OR = 0.684, 95% CI = 0.475–0.985, p = 0.041). Meta-analysis indicated an association between the BsmI B allele and psoriasis in Asians (OR = 0.636, 95% CI = 0.411–0.984, p = 0.041), and showed a significant association between the FF and ff genotypes of the FokI polymorphism and psoriasis in all study subjects and in Turkish studies (OR = 2.028, 95% CI = 1.194–3.446, p = 0.009; OR = 3.582, 95% CI = 1.602–8.009, p = 0.002). This meta-analysis suggests that the VDR ApaI polymorphism confers susceptibility to psoriasis in the Turkish population. In addition, associations were found between the BsmI polymorphism and susceptibility to psoriasis in Asians and between the Fok I polymorphism and psoriasis in the Turkish population.
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